{"id":"CVE-2026-64266","revision":null,"records":[{"revision":"d7bbb702873b435f9723c3b9cc1b85cd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64266","aliases":[],"title":"fuse: re-lock request before returning from fuse_ref_folio()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning.","state":0,"publishedAt":"2026-07-25T08:49:15.142+00:00","modifiedAt":"2026-10-19T20:28:16.797+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/fuse/dev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"1f9156714592356b4fda57beac7eab9c2a462dd3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"5630da218a45ba80f0aba0846cbe8aa655da122b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"1ca605cfa59377f0143fb35b5b01360f37d1b7c4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"0e4a5a000123d81234e27a2f8187688cf608f755\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"e6aa539720c3d8def69683ed0c07cf9faea4e8be\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"be353caffa8640f5e25fb3714ce8b0cef5e410e5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"65a1c2551f7e16085acbb54aedde1feaa559ba7a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c3021629a0d820247ee12b6c5192a1d5380e21c6\",\n \"lessThan\": \"b5befa80fdbe287a98480effed9564712924add5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/fuse/dev.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.35\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.35\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.261\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.212\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.178\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.145\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.96\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.39\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.4\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3","https://git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122b","https://git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4","https://git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755","https://git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8be","https://git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5","https://git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7a","https://git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64266","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64266","identifiers":["CVE-2026-64266"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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